Jahfari Harvey if he’s moved to an OLB Jack rusher position as opposed to a traditional 4-3 DE.
Elijah Roberts & Leonard Taylor as either 5 or 7-technique rushers as well.
It’ll help Kamren Kinchens a lot too by giving him a more defined role on the backend rather than having to play in Manny’s chaotic scheme that places the responsibility of 3 different coverage shells on one Safety.
Who will it hurt? Depends on who they view as the starters at ILB, in a more 3-4 base front you’d prefer more athleticism in the middle so theoretically speaking there’s a number of LB’s you could put there. It may inadvertently hurt Keontra Smith if he’s not put in a more defined position, in a 3-4 you could play him at Sam Backer, but it’s not really his fault because manny basically like a Rover Nickel that played LB & Striker at the same time. Gilbert is in that same category, in a traditional 3-4 his role will be less clear, in the 4-2-5 he was a Hybrid LB/S, Keontra & Gil are actually better suited for a 3-3-5 system, but both of them can still be valuable assets if used correctly.
It should help TAC see the field much quicker as well, he’d be perfect at Mike LB in a new scheme.
Chase Smith has kinda already broke out, but he’s definitely going to be a rising star in the new defense.